frondeur

n.

[F.]
(F. Hist.) A member of the Fronde.

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[F., lit. slinger, from Fronde (from the revolt in which the rebels were compared to schoolboys using slings only when the teacher was not looking)]  /fro(n) dur/
1) a member of the Fronde (the name given to the party which rose in rebellion against Mazarin and the Court during the minority of Louis XIV)
2) transf.  a malcontent, rebel

IN BRIEF: n- Rebel, malcontent, dissident.